Datasheet LM2734 (Texas Instruments) - 5

LM2734 www.ti.com
SNVS288J – SEPTEMBER 2004 – REVISED DECEMBER 2014
6.5 Electrical Characteristics
VIN = 5V, VBOOST - VSW = 5V unless otherwise specified. Datasheet min/max specification limits are ensured by design, test, or statistical analysis.
TJ = 25°C TJ = -40°C to 125°C PARAMETER TEST CONDITIONS UNIT MIN(1) TYP(2) MAX(1) MIN TYP MAX
VFB Feedback Voltage 0.800 0.784 0.816 V ΔVFB/Δ Feedback Voltage Line VIN = 3V to 20V 0.01 % / V VIN Regulation Feedback Input Bias Sink/Source IFB 10 250 nA Current Undervoltage Lockout VIN Rising 2.74 2.90 UVLO Undervoltage Lockout VIN Falling 2.3 2.0 V UVLO Hysteresis 0.44 0.30 0.62 LM2734X 1.6 1.2 1.9 FSW Switching Frequency MHz LM2734Y 0.55 0.40 0.66 LM2734X 92 85% DMAX Maximum Duty Cycle LM2734Y 96 90% LM2734X 2% DMIN Minimum Duty Cycle LM2734Y 1% RDS(ON) Switch ON Resistance VBOOST - VSW = 3V 300 600 mΩ ICL Switch Current Limit VBOOST - VSW = 3V 1.7 1.2 2.5 A IQ Quiescent Current Switching 1.5 2.5 mA Quiescent Current VEN = 0V 30 nA (shutdown) LM2734X (50% Duty 2.5 3.5 Cycle) IBOOST Boost Pin Current mA LM2734Y (50% Duty 1.0 1.8 Cycle) Shutdown Threshold VEN Falling 0.4 Voltage VEN_TH V Enable Threshold VEN Rising 1.8 Voltage IEN Enable Pin Current Sink/Source 10 nA ISW Switch Leakage 40 nA (1) Specified to Average Outgoing Quality Level (AOQL). (2) Typicals represent the most likely parametric norm. Copyright © 2004–2014, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2734 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information 6.5 Electrical Characteristics 6.6 Typical Performance Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Output Overvoltage Protection 7.3.2 Undervoltage Lockout 7.3.3 Current Limit 7.3.4 Thermal Shutdown 7.4 Device Functional Modes 7.4.1 Enable Pin / Shutdown Mode 7.4.2 Soft-Start 8 Application and Implementation 8.1 Application Information 8.1.1 Boost Function 8.2 Typical Applications 8.2.1 LM2734X (1.6 MHz) VBOOST Derived from VIN 5V to 1.5 V/1 A 8.2.1.1 Design Requirements 8.2.1.2 Detailed Design Procedure 8.2.1.3 Application Curves 8.2.2 LM2734X (1.6 MHz) VBOOST Derived from VOUT 12 V to 3.3 V /1 A 8.2.2.1 Design Requirements 8.2.2.2 Detailed Design Procedure 8.2.2.3 Application Curves 8.2.3 LM2734X (1.6 MHz) VBOOST Derived from VSHUNT 18 V to 1.5 V /1 A 8.2.3.1 Design Requirements 8.2.3.2 Detailed Design Procedure 8.2.3.3 Application Curves 8.2.4 LM2734X (1.6 MHz) VBOOST Derived from Series Zener Diode (VIN) 15 V to 1.5 V / 1 A 8.2.4.1 Design Requirements 8.2.4.2 Detailed Design Procedure 8.2.4.3 Application Curves 8.2.5 LM2734X (1.6 MHz) VBOOST Derived from Series Zener Diode (VOUT) 15 V to 9 V /1 A 8.2.5.1 Design Requirements 8.2.5.2 Detailed Design Procedure 8.2.5.3 Application Curves 8.2.6 LM2734Y (550 kHz) VBOOST Derived from VIN 5 V to 1.5 V / 1 A 8.2.6.1 Design Requirements 8.2.6.2 Detailed Design Procedure 8.2.6.3 Application Curves 8.2.7 LM2734Y (550 kHz) VBOOST Derived from VOUT 12 V to 3.3 V / 1 A 8.2.7.1 Design Requirements 8.2.7.2 Detailed Design Procedure 8.2.7.3 Application Curves 8.2.8 LM2734Y (550 kHz) VBOOST Derived from VSHUNT 18 V to 1.5 V / 1 A 8.2.8.1 Design Requirements 8.2.8.2 Detailed Design Procedure 8.2.8.3 Application Curves 8.2.9 LM2734Y (550 kHz) VBOOST Derived from Series Zener Diode (VIN) 15 V to 1.5 V / 1 A 8.2.9.1 Design Requirements 8.2.9.2 Detailed Design Procedure 8.2.9.3 Application Curves 8.2.10 LM2734Y (550 kHz) VBOOST Derived from Series Zener Diode (VOUT) 15 V to 9 V / 1 A 8.2.10.1 Design Requirements 8.2.10.2 Detailed Design Procedure 8.2.10.3 Application Curves 9 Power Supply Recommendations 10 Layout 10.1 Layout Guidelines 10.2 Layout Example 11 Device and Documentation Support 11.1 Third-Party Products Disclaimer 11.2 Trademarks 11.3 Electrostatic Discharge Caution 11.4 Glossary 12 Mechanical, Packaging, and Orderable Information